$4.$ The contingent valuation method $($CV$)$ is fundamentally imperfect, so it is not commonly used in cost$-$benefit analysis.

True $/$ False

The hedonic pricing method can be used to estimate the non$-$use values of saving rhinos from extinction, but the contingent valuation method cannot.

True $/$ False

Current atmospheric concentrations are unusually high for this century, but relative to averages over the last $100,000$ years they are actually normal.

True $/$ False

Climate change mitigation is an excludable good.

True $/$ False